782136725 has 6 divisors (see below), whose sum is σ = 969849570. Its totient is φ = 625709360.

The previous prime is 782136713. The next prime is 782136743. The reversal of 782136725 is 527631287.

It can be written as a sum of positive squares in 3 ways, for example, as 133772356 + 648364369 = 11566^2 + 25463^2 .

It is not a de Polignac number, because 782136725 - 2⁶ = 782136661 is a prime.

It is a super-2 number, since 2×782136725² = 1223475713187451250, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15642710 + ... + 15642759.

It is an arithmetic number, because the mean of its divisors is an integer number (161641595).

Almost surely, 2^782136725 is an apocalyptic number.

It is an amenable number.

782136725 is a deficient number, since it is larger than the sum of its proper divisors (187712845).

782136725 is a wasteful number, since it uses less digits than its factorization.

782136725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31285479 (or 31285474 counting only the distinct ones).

The product of its digits is 141120, while the sum is 41.

The square root of 782136725 is about 27966.7074393823. The cubic root of 782136725 is about 921.3561933471.

The spelling of 782136725 in words is "seven hundred eighty-two million, one hundred thirty-six thousand, seven hundred twenty-five".